Worries over a global recession are widespread at present leading to the sell off. Just five minutes after opening the market had gone from 4314 to 3879 representing a fall of over 10 per cent.
As of now (8.40), the market is edging back towards the 4000 mark, currently standing at 3984. One would hope that it has found a support level, although in the current climate it is far too early to say.